Furnace door



24, 1 4, H. R. LOXTERMAN 2,471,275

FURNACE DOOR Filed June 28, 1945 INVENTOIL Henry R Loxferman PatentedMay 24, 1949 FURNACE DOOR Henry R. Loxterman, Chicago, Ill., assignor toBlaw-Knox Company, Pittsburgh, Pa., a, 0.01- poration of New JerseyApplication June 28, 1945., Serial No. 602,121

2 Claims.

This invention relates to a furnace door and, in particular, to aWater-cooled door comprising generally a double-walled panel and arefractory lining on the inner face thereof.

One form of water-cooled furnace door which has performed satisfactorilyin service has its double-walled panel composed of a plurality ofsub-panels or box sections disposed side-by-side in spaced relation, andalinin of refractory brick mortised into the slots or spaces betweenadjacent sub-panels. The lining of such doors, however, takesconsiderable time and skill because of the mortise fit between thebricks and the panel and without this fit, the life of the door ismaterially reduced.

I have invented an improved door including a plurality of spaced boxsections or sub-panels disposed side-by-side and so constructed as toaccommodate a brick arch on the inner side. The outer wall of the dooris preferably flat while the inner wall lies substantially in thesurface of a cylinder having its axis vertical and on the inner side ofa door. A lining of brick or other refractory material may thus beeasily laid up on the inside of the door in the form of an arch so as to'be self-retaining without the necessity of mortising the lining intothe slots between adjacent sub-panels or box sections.

For a complete understanding of the invention, reference is made to theaccompanying drawings illustrating a preferred embodiment, and to thefollowing detailed description thereof. In the drawings,

Figure l is an elevation of my improved door;

Figure 2 is a vertical section therethrough along the plane of lineII-II of Figure l, and

Figure 3 is a view partly in plan and partly in horizontal section alongthe plane of line IIIIII of Figure 1.

Referring in detail to the drawings, the door of my invention indicatedgenerally at In includes a hollow panel I I having an inwardlyprojecting flange l2 extending therearound and in communicationtherewith. The panel H is composed of sub-panels or box sections l3 andl3a. These sub-panels are disposed side-by-side in spaced relation,extend between the top flange l4 and the bottom flange l5 andsubstantially fill the space between the side flanges 56, except forelongated vertical openings or slots ll between adjacent sub-panels. Itwill be noted that all the sub-panels communicate with the top andbottom flanges and that the panels |3a also open into the side flangesHi.

The outer faces of the sub-panels are substantially flat and coplanar.The inner faces, how ever, lie substantially in the surface of avertical cylinder having its axis on the inner side of the door. Thisconstruction provides a concave recess on the inner side of the dooradapted to accommodate refractory material I! laid up in the form of anarch against the inner walls of the sub-panels to serve as a lining forthe door. The lining may conveniently be composed of firebrick laid upwith suitable mortar.

As shown in Figure 3, the lining does not enter the slots ll. It is heldin place by its arch shape. The lining may be easily and quickly appliedsince it is composed principally of standard bricks with an occasionalarch brick to introduce the necessary curvature.

The top flange I4 is provided with the usual inlet l8 and outlet l 9 forcooling water while the bottom flange has wash-out openings [9 thereinprovided with screw plugs 20. A peep hole 2| is formed in the centralsub-panel l3 near the bottom flange [5.

It will be apparent from the foregoin description that the inventionprovides a door which has several advantages over doors of similargeneral type as heretofore constructed in that the lining isself-retained without the necessity of a mortise fit into the slotsbetween the sub-panels which requires a substantial amount of time andskill. The lining, furthermore, may be applied quickly and easily with aminimum of cutting bricks to fit.

Although I have illustrated and described but a preferred embodiment ofthe invention, it will i be recognized that changes in the details ofthe construction disclosed may be made Without departing from the spiritof the invention or the scope of the appended claims.

I claim:

1. A furnace door, comprising in combination, a pair of spaced hollowside flanges, spaced hollow top and bottom flanges extending betweensaid side flanges, all of said flanges having inner faces, a pluralityof spaced hollow panels disposed sideby-side and extending between saidtop and bottom flanges, the outer faces of said panels lyingsubstantially in a common surface, the inner faces of said panels lyingsubstantially in the surface of a vertical cylinder whose axis isadjacent the inner side of said door and is substantially equidistantfrom said side flanges, said inner faces of said panels being set backfrom said inner faces of said flanges and thereby defining with saidflanges a concave space, a refractory brick lining of substantiallyuniform thickness disposed in said space, said lining having its outersurface coinciding substantially entirely with said surface of saidvertical cylinder, whereby a refractory lining of uniform thickness maybe quickly and readily made of standard brick and be subject tocontinuous visible overall observation.

2. A furnace door, comprising in combination, a pair of spaced hollowside flanges, said side flanges having opposed faces converginginwardly, spaced hollow top and bottom flanges extending between saidside flanges, all of said flanges having substantially vertical innerfaces, a plurality of spaced hollow panels disposed side-by-side andextending between said top and bottom flanges, the outer faces of saidpanels being substantially flat and coplanar, the inner faces of saidpanels lying substantially in the surface of a vertical cylinder whoseaxis is adjacent the inner side of said door and is substantiallyequidistant from said side flanges, said inner faces of said panelsbeing set back from said inner faces of said REFERENCES CITED followingreferences are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,211,884 Schmidt Jan. 9, 19172,259,900 Loxterman Oct. 21, 1941

